PORTSMOUTH — A Milton man accused of sexually assaulting a mentally handicapped man in November has waived his probable cause hearing on Monday, and his case has moved to the county superior court.

John C. Riley, 41, of 1147 White Mountain Highway No. 3 in Milton, who is now free on bail, is facing felony-level kidnapping and aggravated felonious sexual assault charges. Riley, who worked for Living Innovations at the time, allegedly assaulted his client, a 35-year-old man with a mental disability, while he was supposed to be driving him home after a Halloween party.

After he waived his probable cause hearing at Portsmouth Circuit Court Monday morning, his charges were bound over to the Rockingham County Superior Court, where a grand jury will consider indicting him on the felony counts.

Riley also faces a misdemeanor-level indecent exposure charge in connection with the Nov. 2 incident. That charge will be tried alongside the felony charges at Rockingham County Superior Court, said Dave Colby, detective prosecutor for Portsmouth police.

According to court officials, Riley posted his $30,000 cash bail on Jan. 22, and he is currently out on $35,000 personal recognizance bail.

According to police, the Nov. 2 incident occurred after a Halloween party hosted by Living Innovations on Lafayette Road. As Riley was driving the alleged victim home, he stopped at a Home Depot parking lot off Arthur Brady Drive and sexually engaged with him without consent.

The kidnapping charge claims Riley confined the 35-year-old man with the purpose of sexually assaulting him, and the aggravated felonious sexual assault charge claims he engaged in a sex act with the alleged victim, after the alleged victim told him to stop.

The indecent exposure, or lewdness charge, a Class A misdemeanor, alleges Riley performed a sexual activity while in the parking lot of a busy retail establishment to which the public had access.